What are the two different kinds of minimum wage in Vietnam?

1. The common minimum wage (VND1,150,000 or US$55) is used to calculate salaries for employees in state-owned organizations and enterprises, as well as to calculate the social contribution for all enterprises (i.e. the maximum social contribution is 20 times the common minimum wage).  
2. Used for employees in all non-state enterprises based on zones as defined by the government. Currently, Vietnam divides its minimum wage into four different zones.

The country’s minimum wage only applies to Vietnamese employees doing the most basic work under normal working conditions. For those who have passed vocational training courses, including company training, wages are at least seven percent higher than minimum wage rates.